Boat construction



March 3, 1931. H. w. HALL BOAT CONSTRUCTION 3/ @24 m v. g z M.. mi m ,2371/622 for WWW oz'iiqy ggf Patented Mar. 3, 1931 U'i'siir'*ri-1n STATES PATENT OFFICE HORACE W, HALL, F NEWTON, MASSACHUSETTS, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO DOROTHY K. HALL7 0F NEWTON, MASSACHUSETTS VBOAT .CONSTRUCTION Application led August 7, 1929. Serial No. 384,018.

This invention relates to improved :boat constructionor other floating apparatus, and -particularlyto speed boats to take out-board motors, and improvedmethods of constructing. same;

Y One of `the objects of my invention is to make the :sidesand stern of a speed boat from'it-wo halves, each half extending from Vtip yofbow to middle of stern and being an 1.o entity itself. Y j

These-two sides are formed independently ofthe rest of the boat, being composed of an outer panel -of several plies ofv thin wood vencer and an inner panel of the same mater-inl with a liller of cork, balsa wood or other like buoyant material between. The said-.plies and filler are glued together with waterproof glue, and while the glue is still plastic the whole is bent under pressure into 'the required shape, the pressure being applied untilthe glue hardens and is thoroughly set.

Each half being separately assembled into permanent shape, it is itself rigid and rigforous andrequires no ribs'or other support Ato maintain its shape,thussaving cost in asvsembly of the boat and lessening c0nsider- 'ably vthe Atime and labor required' at present yto construct the sides.

Joints .and caulking, .heretofore necessary to keep the sides and stern from leaking, are Vdispensed with. Evcn'thoughthe bottom of the boat leaks or is Vstove in, `my sides and stern,ibeing an entity themselves will nsupport themotor and save the same fromimmersion andl willserve as a float which will i 'the'fvibration it causes whenrunning tends` tol'o'osen or open thesejoints which areunder a. continual strain. kIt has been impos- `sible to reinforce these joints so as `to prevent some `leakage occurring after the 4boat has been in use a short time.

lVith my construction, however, I have done away with this leakage. Only a single ,joint is formed at the stern and this is a 'which hold the motor attachment are partly on one side and partly on the other, and therefore the weight of the motor attachment is equally divided'between the two sides thus dividing vibration. As the sides are each integral they are strong enough to withstandthis vibration and there is no tendency for the'single joint formed to develop a leak.

rlhere are preferably Bplies of wood ve neer used in the construction of both the outside and inside panels, the plies being cross banded. They should be thin enough to bend freely without internal strain and without steaming, and I have found that plies of Mq thickness or less are satisfactory. These plies not only furnish the necessary stifi'ening and strength; but they also give lthe sides interiorly and eriteriorly a natural beauty of finish by the use of mahogany or finished wood for the exposed layers, the other veneers being of any suitable cheaper wood.

The filler of buoyant material, which should be about 1 thick, not only furnishes buoyancy, but is'also `ainedium of strength because being glued totheveneer plies it becomes an integral part of the side. In using the term buoyant material I mean to include any material or substance having a specific gravity of 0.30 orless such as cork, balsa wood, etc.

The results attained by my new construction as compared with boat construction heretofore known are economy of manufacture, increased speed obtainable due to lightness and buoyancy, safety due to the sides being made a separate entity from the bottom, and

El il water tightness due to strengthening and reducing the number of ]oints.

With the above and other objects in View which will more readily appear as the nature of the invention is better understood, the

Vsame consists in the novel construction, oom- Y f Figure et 'isa sectionl talrenonlthe lines of Figure'2. A lFigure 5 'is a. section taken' on the lines 5 5 ot Figure 2.

Figure 6 is a 'fragmentary seet-ionalview showing the' material used in the construction ot thesides of my boat.

, Figure 7 is atragmentary perspective-view ot the rear end of 'my boat.

is illustrated thesides l1 of my boat ronsist 'ot several plies of one-piece thinwood veneer l2 and a filler 13 otcorln'balsa wood `or'other buoyant material. l use preferably three plies ot veneeron each side 'of the filler, although. the number plies'may be varied, and theglill'er is preferably about oneinch thick.l rlliese layers ot Vveneer andv lillei" vare glued to each other with an adhesive substance such as waterproof glue, and while the glue is still plastic the whole side structure is bent or moulded Vunderpressure to term the side and part ofthe stern ot boat, extending from bow to the center `of the stern, shown in Figure l vot the drawings. A

The pressure is applied until the glue becomes hard and set, which *esme an integral structure forming a conu part of the stern ot a Vboat,"which Vin itsel't' is 'firm and rigid.

'l''etore assemblingthe boat proper, the two side units 'll are brought together and joined with a waterproof glue or other adhesive at the bow and stern, and pressure is applied at the points o'tunion until the glue has firmly set. The two sides are now an integral structure, and a very strong one. The wooden cleats or plates 17' are placed on the outside and inside ot the boat and bolted at i8 to the two stern portions for reinforcement purposes as previously explained.

ln assembling the boat proper a metal strip it covers therjoint at the bow, extending vifrointlie top part way under the bottom. ln order that the bottom '20 of my boat maybe more durable, hold its shape better and `hai/e less skin'triction when the boat is speeding, l preferably make the bottom Vot metal suoli as duralumin. It is turned up at the edges to-torm flanges 2l kand is tightly held to the sides ll of the boat by bolts 22 which extend through said sides and flanges. These ltlanges are parallel to the sides othe boat for their ull length to Vcontorni tothe varying shape of said sides.. `Gaskets, not shown, may be used to insureywater tightness, and some calking may be necessary-between the sides and-flanges. y Y

As show-ii in lrfigures and' ot the drawings itis custoiiiaiy in speed boats to step the bottom alittle more than halt way back from the bow, and this step is made by a cross member The keel 25 is a prolongation ot the'keel stein l5 and extends the length of the bottomll The crossmember 24 is mortised as atV 26 to vreceive any endet vtherlreel25as shown in`v llfigurey;A Bolts 27,' preferably countersunlr, extending* throughthe cross member. and both porti ons ot the keelv make a tight'union here. rlhis cross member 24 is Y also attached to the metal bottom by bolts 28.'

At tliejrearforV sternportion ot the boat an angle iron 80 extends from one side to the other just below the cleats 17, bent-to conform tothe shape the stern. The bottom 2O is extended as at 2Go beyo'ndthe stern'to prevent cavitating, 'and is provided with a recess 202) to accommodate the propeller shalt. The deck is given-the -`numeral Blf and has a beading 32. krllhe sides vllot-the boat are iL'irovided with topv rails 33 of finished wood.

Y While a specilic embodiment fot the inventron has'beenillustrated and described, the invention is not to be considered, as limited- 'to the partcula-rfcombination andarrangement otparts as above described., except as limited in scope by the appended claims.

What ly claim is: v l. Structure tor the sides ot aboat comirising a plurality ot'plies ot wood veneer on the outside, a buoyant 'material for the center anda plurality ot plies of wood -Veneer on the inside, said plies and buoyant material being united together to torni Van integral 1 whole.

Y 2. Structure for the 'sides ot a boat coniirising ar outside panel, an inside panel and va filler, said panels en'ibodying a plurality oi" plies ot wood veneer glued together, f said liller .embodying a buoyant material .glued to and between said panels.

" L Structure 'for the sides ot a boat? com'- prisingv a plurality ot thin strips oi Vonepiece wood veneer on the outsidefandinside and a liller of buoyant material between said strips, the whole being permanently united together. A

I il. Structure for the sides and stern of a boat comprising a plurality of thin strips of iiexible, one-piece Vwood veneer on the outside and inside, and a filler of balsa wood between vsaidv strips, the whole being united by a waterproof substance.

5. A boat comprising a bottom andv two sides joined together at the bow and stern and fastened to said bottom, each side embodying one-piece plies of wood Veneer extending from the bow the length of the boat Y ant material between said plies, said plies and layer being permanently united together' to form an integral whole and being so shaped as to also form the stern, said bottom having a flange adapted toflap over part of said sides and means attached to said fiange and sides to hold them firmly together.

8. A boat comprising a metal bottom and two sides, each side comprising a plurality of plies of wood veneer and a layer of buoyant material between said plies, said plies and layer being permanently united together to form an integral whole and being so shaped as to also form the stern, said bottom having a flange adapted to lap over part of said sides and ruiming parallel to said sides at all points from stem to stern, and means to hold said flange and sides together.

` 9. A boat comprising a bottom and two sides, each side extending from the bow the length of the boat and forming part of the stern, the two sides forming a joint at one end at the center of said stern, an'outside cleat and an inside cleat each covering and overlapping said joint and fastened to both of said sides.

l0. The method of forming the side of a boat which comprises laying together a plurality of plies of woodveneer and a filler of buoyant material after first treating with au adhesive, bending the whole by pressure to the required shape and keeping under pressure until the adhesive has set.

ll. The method of forming the side of a boat extending from the bow to, and forming part of, the stern, which comprises uniting together with an adhesive a plurality of plies of wood veneer with a filler of buoyant material intermediate the outsideV and inside plies, and molding the whole under pressure to the required shape while said adhesive is in plastic condition, and continuing the application of pressure until the adhesive has set.

12. The method of forming the side of a boat in one piece extending from the bow to and forming part of the stern, which com.n prises treating a plurality of plies of onepiece wood veneer and a layer of buoyant material with a waterproof adhesive, laying said plies together one upon the other with said layer of buoyant material intermediate the top and bottom plies, molding the whole under pressure to the required shape while said adhesive is in plastic condition, and continuing the application of pressure until said adhesive has set.

13. The method of forming the side of a boat which extends from the bow to the stern and forms a part of said stern, comprising uniting together with a waterproof glue a plurality of one-piece plies of wood veneer with a filler of buoyant material between them, molding the whole under presure while said glue is in plastic condition to the required shape and continuing the pressure until said glue has set.

14. The method of forming theside of a boat which comprises laying together a plurality of plies of wood veneer and a filler of buoyant material after first treating said plies and filler with a waterproof adhesive, molding the whole under pressure to the required shape while the adhesive is in plastic condition, and keeping under pressure until the adhesive has set.

l5. A boat comprising a bottom, sides, and a stern of such width that it is adapted to have an outboard motor fastened to it, said sides and stern being composed of two parts joined together, said parts embodying a plurality of plies of wood veneer united together and bent to the desired shape whereby said sides and stern are formed of said two parts.

16. A boat having a substantially pointed bow and a broad stern, comprising a bottom and a plurality of sides, said sides embodying a plurality of plies of wood veneer united together, said plies being so bent whereby the stern is formed of the same plies that form the sides.

17. A boat comprising a bottom and a plurality of sides fastened to said bottom, each side embodying a plurality of plies of wood veneer united together, said plies extending from the bow to and forming part of the stern, said stern being sufficiently broad to accom niodate an outboard motor.

HORACE W. HALL.` 

